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प्रश्न
Show how will you synthesize pentan-1-ol using a suitable alkyl halide.
उत्तर
Hydrolysis of 1-bromopentane by aqueous NaOH gives pentan-1-ol.
\[\ce{\underset{1-bromopentane}{CH3 - CH2 - CH2 - CH2 - CH2 - Br} + NaOH ->[\Delta][S_{N}2 Hydrolysis ] \underset{pentan-1-ol}{CH3CH2CH2CH2 - CH2 - OH} + NaBr}\]
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संबंधित प्रश्न
Write the mechanism of the following reaction :
Write the mechanism of the following reaction :
Name the reagent used in the following reaction:
Oxidation of a primary alcohol to carboxylic acid.
When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place:
\[\begin{array}{cc}
\phantom{.......................}\ce{Br}\\
\phantom{......................}|\\
\ce{CH3 - CH - CH - CH3 ->[HBr] CH3 - C - CH2 - CH3}\\
\phantom{.}|\phantom{......}|\phantom{......................}|\phantom{........}\\
\phantom{}\ce{CH3}\phantom{...}\ce{OH}\phantom{...................}\ce{CH3}\phantom{.....}
\end{array}\]
Give a mechanism for this reaction.
(Hint: The secondary carbocation formed in step II rearranges to a more
stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.)
Lucas test is used for the detection of _____________.
In the reduction \[\ce{R - CHO + H2 -> RCH2OH}\] the catalyst used is:
By which of the following methods alcohol can be prepared in excellent yield?
Lucas test is done to differentiate between ____________.
During dehydration of alcohols to alkenes by heating with cone. H2SO4 the initial step is ____________.
Suggest a reagent for the following conversion.
Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert-butyl ether can’t be prepared by this method. Explain.
Why is the C – O – H bond angle in alcohols slightly less than the tetrahedral angle whereas the C – O – C bond angle in ether is slightly greater?
Assertion: Bond angle in ethers is slightly less than the tetrahedral angle.
Reason: There is a repulsion between the two bulky (–R) groups.
The correct geometry around oxygen in CH3OCH3 is
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene
